113331221 has 4 divisors (see below), whose sum is σ = 113354112. Its totient is φ = 113308332.

The previous prime is 113331161. The next prime is 113331247. The reversal of 113331221 is 122133311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 113331221 - 2²² = 109136917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113331221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113331121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581 + ... + 15066.

It is an arithmetic number, because the mean of its divisors is an integer number (28338528).

Almost surely, 2^113331221 is an apocalyptic number.

It is an amenable number.

113331221 is a deficient number, since it is larger than the sum of its proper divisors (22891).

113331221 is an equidigital number, since it uses as much as digits as its factorization.

113331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22890.

The product of its digits is 108, while the sum is 17.

The square root of 113331221 is about 10645.7137384019. The cubic root of 113331221 is about 483.9307168660.

Adding to 113331221 its reverse (122133311), we get a palindrome (235464532).

The spelling of 113331221 in words is "one hundred thirteen million, three hundred thirty-one thousand, two hundred twenty-one".